ABSTRACT The specific absorption rate of magnetic nanoparticles in a rotating magnetic field has been calculated taking into account both thermal fluctuations of the particle magnetic moments and strong magneto-dipole interactions in nanoparticle clusters with various filling factors. For an assembly of interacting superparamagnetic nanoparticles, the maximal values of the specific absorption rate in a rotating magnetic field are found to be 30–40% greater than that in alternating magnetic field. In addition, for the given filling factor and magnetic field amplitude in rotating magnetic field the nanoparticles in a wider range of diameters can effectively contribute to the energy absorption process. Therefore, the use of rotating magnetic field seems preferable in magnetic nanoparticle hyperthermia.

中文翻译：

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在旋转磁场中加热磁性纳米粒子

摘要 考虑到粒子磁矩的热波动和具有各种填充因子的纳米粒子簇中的强磁偶极相互作用，计算了磁性纳米粒子在旋转磁场中的比吸收率。对于相互作用的超顺磁性纳米粒子的组装，发现在旋转磁场中比吸收率的最大值比在交变磁场中的大 30-40%。此外，对于给定的旋转磁场中的填充因子和磁场幅度，更广泛直径的纳米颗粒可以有效地促进能量吸收过程。因此，在磁性纳米粒子热疗中使用旋转磁场似乎更可取。